EP 1081846 A1 20010307 - Voltage controled oscillator
Title (en)
Voltage controled oscillator
Title (de)
Spannungsgesteuerter Oszillator
Title (fr)
Oscillateur commandé en tension
Publication
Application
Priority
- JP 24627799 A 19990831
- JP 2000002736 A 20000111
Abstract (en)
Disclosed is a voltage controlled oscillator which is prevented from generating an abnormal oscillation signal and realizes reduction in the number of parts used including a large part, a smaller structure as a whole, and a lower manufacturing cost. This voltage controlled oscillator comprises: an oscillation transistor (11) which operates by common-base connection and outputs an oscillation signal from the emitter; an amplification transistor (12) which operates by common-emitter connection and whose base receives the oscillation signal; and a resonance circuit (2) connected to the collector of the oscillation transistor. In the resonance circuit, an inductor (21) for resonance is connected in a d.c. circuit provided between the collector of the oscillation transistor and the emitter of the amplification transistor, and a capacitor for resonance is connected between the collector of the oscillation transistor and an earth point. <IMAGE>
IPC 1-7
IPC 8 full level
H03B 5/02 (2006.01); H03B 5/12 (2006.01); H03B 5/18 (2006.01); H03L 7/187 (2006.01); H03B 1/00 (2006.01); H03B 1/04 (2006.01)
CPC (source: EP KR)
H03B 5/1203 (2013.01 - EP); H03B 5/1231 (2013.01 - EP); H03B 5/1268 (2013.01 - EP); H03L 7/187 (2013.01 - KR); H03B 2201/0258 (2013.01 - EP); H03B 2202/07 (2013.01 - EP); H03B 2202/08 (2013.01 - EP)
Citation (search report)
- [A] US 5440276 A 19950808 - KIM JUNG H [KR]
- [A] JP H0555828 A 19930305 - SUMITOMO METAL IND
Designated contracting state (EPC)
DE FI FR SE
DOCDB simple family (publication)
EP 1081846 A1 20010307; EP 1081846 B1 20030521; CN 1147990 C 20040428; CN 1347194 A 20020501; DE 60002803 D1 20030626; DE 60002803 T2 20031224; JP 2001144534 A 20010525; JP 3742267 B2 20060201; KR 100342373 B1 20020703; KR 20010021460 A 20010315
DOCDB simple family (application)
EP 00306590 A 20000802; CN 00123624 A 20000825; DE 60002803 T 20000802; JP 2000002736 A 20000111; KR 20000050613 A 20000830